The vertical direction of face is determined by the PCA at the random pose. Based on surface registration, the symmetrical surface and symmetricalprofile are extracted.
在人脸任意位置下，利用PCA自动确定人脸纵方向，采用网格配准方法提取对称面和对称轮廓线；
2
It also looks symmetrical in profile.
在横剖面上它看起来也是对称的。
3
The obtained profile of spectral line has a typical and symmetrical shape of line. The line width (FWHM) was measured to be 3. 2 GHz.